I had a thought. I have access to straight gas locally with no ethanol. Everyone says use ethanol free fuel in smaller engines and in ATVs. I get why you would want no ethanol but all the stations I have ever seen that offer straight gas is not a top tier fuel. Even if your at a shell or Mobil the straight gas they offer you at that special pump is not name brand and likely not up to minimum additive standards. That's why they call it "recreational fuel" or "off road fuel". So if you burn it fast enough would using e10 top tier be better than straight gas no or low additive?